Answer: The roots of shrubs like your Euonymus generally remain in the top 10-12 inches of soil and spread out from there. Any roots that penetrate deeper will generally grow around any obstruction, including plastic or metal water pipes. I don't think the roots will cause any damage, however they may invade the pipe if there is a crack in the pipe or in a joint. The roots aren't strong enough to break the pipes, but they will grow towards a water source so if there is an existing leak, the roots will certainly find it.
Hope this answers your question!
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